According to the axial stress characteristics of fiber Bragg gratings，fiber Bragg gratings with different Bragg-wavelength are written based on a uniform phase mask.Bragg-wavelengths are 1072.955nm,1071.516 nm,1070.917 nm,1069.863 nm,1068.298 nm respectively.The relationship between tension and the centre wavelength of fiber gratings is achieved by fitting experiment datum，the experimental fitting curve with theoretical curve is very similar.This method has the advantages of simple implementation，flexible wavelength design and low-cost fabrication，and it has a good application value.